I experienced this for the 1st time last Sat night, on a couple of tracks at a disco with live bands. It was fun!
Yes, don’t do it often!
I’d like to get that bass capability in my house. I mostly listen to pop/ rock.

Apart from big organ pipes, the start of DSotM and other exceptions, not much music contains much signal at 20 Hz.
By 20 Hz, PAs are probably down about 12 dB or much more. I wouldn’t have thought it was that low.

It does take about 110dB, and below 40 Hz. That's average SPL, not peak. So you need at least 10dB of headroom and a few dB for power compression - that means a system that can do 120-125dB at the listening (?) position calculated from SPL 1M/1W. This is easy at 60 or 70 Hz. Not so easy in the 30's.

When considering such large-scale systems, SPL 1M/1W approximately equals SPL at 100 ft/ 1kW. Coupled horn loaded systems can do about 115 dB/W. With 10kW of amp power, such a system can do 110 honest average dB at 100 feet. At 1 meter, it goes way beyond moving pantlegs. More like feeling a shockwave - it makes you queasy and you can hardly stand up straight. Use OSHA-approved hearing protection when attempting this (seriously - ears COVERED!!) I've done this with four labhorns - I've never had the nerve to get that close to all 8. What test track? AC/DC, "You Shook Me All Night Long", played though a subharmonic synthesizer.

btw, this was inn a large room that you’d see bands in, not the confines of a car

You really think you need that much volume to vibrate clothing??

I wasn’t wearing armour, just plain old blue denim . .

Two labsubs mounted beneath the stage with one channel of QSC EX4000 for each driver, highpassed att 55Hz (48dB digital+12dB analog/oct) will move my pants.
One decent 2x18" can get 133dB and a small room has a very different behaviour compared to outdoors.